.kerwinactive{
    color:red;
}

.tabbar{
    position: fixed;
    bottom: 0;
    left:0;
    width: 100%;
    background: white;
    height: 50px;
    line-height: 50px;
    text-align: center;
}

.tabbar ul{
    display: flex;
    list-style: none;

}
.tabbar li {
    flex:1
}